chore(docs): add changelog and release notes generation #1

	name: Changelog prepare

	on:
	pull_request:
	types: [opened, reopened, synchronize]
	paths:
	- "CHANGELOG/*.yaml"

	jobs:
	changelog-prepare:
	name: Translate changelog and update release notes
	# Secrets and push-back are unavailable for fork PRs; also keeps
	# untrusted fork code off the self-hosted runner.
	if: github.event.pull_request.head.repo.full_name == github.repository
	runs-on: [self-hosted, large]
	permissions:
	contents: write
	steps:
	- name: Checkout PR branch
	uses: actions/checkout@v4
	with:
	ref: ${{ github.head_ref }}
	token: ${{ secrets.CHANGELOG_PUSH_TOKEN \|\| github.token }}

	- name: Translate changelogs missing a .ru.yaml counterpart
	env:
	GPT_API_TOKEN: ${{ secrets.GPT_API_TOKEN }}
	GPT_API_URL: ${{ secrets.GPT_API_URL }}
	run: \|
	for f in CHANGELOG/v*.yaml; do
	case "$f" in *.ru.yaml) continue;; esac
	ru="${f%.yaml}.ru.yaml"
	if [ ! -f "$ru" ]; then
	echo "translating $f -> $ru"
	hack/chlog.py -o "$ru" translate -f "$f" -l ru
	fi
	done

	- name: Generate release notes
	run: \|
	hack/chlog.py -o docs/RELEASE_NOTES.md release-notes -d CHANGELOG/ -l en
	hack/chlog.py -o docs/RELEASE_NOTES.ru.md release-notes -d CHANGELOG/ -l ru

	- name: Commit and push changes
	env:
	HEAD_REF: ${{ github.head_ref }}
	run: \|
	if [ -z "$(git status --porcelain)" ]; then
	echo "nothing to commit, translations and release notes are up to date"
	exit 0
	fi
	git config user.name "ci-changelog"
	git config user.email "[email protected]"
	git add CHANGELOG/ docs/
	git commit -m "internal(changelog): Add translations and update release notes"
	git push origin "HEAD:${HEAD_REF}"

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